<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <button>点击我获取xml数据</button>
    <script>
        let btn = document.querySelector("button")
        btn.onclick = function () {
            let xhr = new XMLHttpRequest();
            xhr.open("get", "/getxml");
            xhr.send();
            xhr.onload = function () {
                if (xhr.status >= 200 && xhr.status < 300) {
                    console.log(xhr.responseXML);
                    let name = xhr.responseXML.querySelector("book1 name").innerHTML;
                    console.log(name);
                }

            }
        }
    </script>
</body>

</html>